re-enable libstdc++ 4.8

- in context of #152

Author: olk

build/Jamfile.v2

@@ -70,7 +70,6 @@ lib boost_fiber
                cxx11_defaulted_functions
                cxx11_final
                cxx11_hdr_mutex
-               cxx11_hdr_regex
                cxx11_hdr_tuple
                cxx11_lambdas
                cxx11_noexcept
@@ -137,7 +136,6 @@ lib boost_fiber_numa
                cxx11_defaulted_functions
                cxx11_final
                cxx11_hdr_mutex
-               cxx11_hdr_regex
                cxx11_hdr_tuple
                cxx11_lambdas
                cxx11_noexcept

src/numa/linux/topology.cpp

@@ -20,10 +20,14 @@
 #include <boost/filesystem/fstream.hpp>
 #include <boost/format.hpp>
 
+#include "boost/fiber/exceptions.hpp"
+
 #ifdef BOOST_HAS_ABI_HEADERS
 # include BOOST_ABI_PREFIX
 #endif
 
+#if !defined(BOOST_NO_CXX11_HDR_REGEX)
+
 namespace al = boost::algorithm;
 namespace fs = boost::filesystem;
 
@@ -196,6 +200,31 @@ std::vector< node > topology() {
 
 }}}
 
+#else
+
+namespace boost {
+namespace fibers {
+namespace numa {
+
+#if BOOST_COMP_CLANG || \
+    BOOST_COMP_GNUC || \
+    BOOST_COMP_INTEL ||  \
+    BOOST_COMP_MSVC
+# pragma message "topology() not supported without <regex>"
+#endif
+
+BOOST_FIBERS_DECL
+std::vector< node > topology() {
+    throw fiber_error{
+        std::make_error_code( std::errc::function_not_supported),
+            "boost fiber: topology() not supported without <regex>" };
+    return std::vector< node >{};
+}
+
+}}}
+
+#endif
+
 #ifdef BOOST_HAS_ABI_HEADERS
 # include BOOST_ABI_SUFFIX
 #endif